I believe a problem related to several lines like the following:

2013-03-13 11:25:04.042903 [DEBUG] mod_unimrcp.c:702 (TTS-2195) audio queue overflow!

Caused my core dump today.

I believe this JIRA issue may be related: http://jira.freeswitch.org/browse/FS-4527

I am using Nuance MRCPv1 for TTS from an external server. For about 1.5 hours it worked fine, followed by the core dump – I am not even close to what I thought would be my capacity.

-Jason